Dielectric barrier discharge lamp and irradiation device

Abstract

A dielectric barrier discharge lamp with a translucent part made of silica glass which contains OH radicals and in which damage of the silica glass by UV radiation can be suppressed and a sufficient amount of UV radiation can be obtained in a dielectric barrier discharge lamp, in which a silica glass discharge vessel is filled with a discharge gas which forms excimer molecules by a dielectric barrier discharge and which is at least partially provided with a translucent part, by the translucent part having a ratio of non-hydrogen bonding OH radicals to the total number of OH radicals which is less than or equal to 0.36.

What we claim is:  
     
       1. Dielectric barrier discharge lamp, comprising a silica glass discharge vessel filled with a discharge gas which forms excimer molecules by a dielectric barrier discharge and which is at least partially provided with a translucent part; wherein the translucent part has a ratio of non-hydrogen bonding OH radicals to a total number of OH radicals which is at most equal to 0.36. 
     
     
       2. Irradiation device comprising at least one dielectric barrier discharge lamp and a window component, the at least one dielectric barrier discharge lamp having a discharge vessel in which excimers are produced and UV radiation being emitted by a dielectric barrier discharge; wherein the window component and the at lest one dielectric barrier discharge lamp are arranged such that the UV radiation of the at least one dielectric barrier discharge lamp emerges through the window component; and wherein the window component is made of silica glass in which a ratio of the non-hydrogen bonding OH radicals to a total number of OH radicals is at most equal to 0.36.